Arkansas Democratic Sen. Mark Pryor is going on the air with a two-day ad buy this week, his latest in a paid media campaign that’s started unusually early in his reelection effort, POLITICO has learned.

Pryor’s latest buy is about $45,260 in the Little Rock, Fort Smith and Jonesboro markets, and only is set to air Tuesday and Wednesday, a source tracking the air wars confirmed.

A Pryor aide didn’t respond to emails about the ad and what it will say.

But the buy comes just after GOP Rep. Tom Cotton made clear he plans to run for the Senate seat.

Pryor campaign manager Jeff Weaver said, “We hope to frame the race early. People don’t know enough about Tom Cotton, I mean, he’s only been in Congress a few days. We felt that it is important let Arkansans see the real Tom Cotton. The ad will highlight what Tom Cotton has done in the short amount of time he has been in Washington.”

Cotton, a military veteran and Harvard Law graduate who is seen as one of the GOP’s most promising Senate recruits, has served in the House since January.

Pryor has been under siege on TV from both conservatives and from New York City Mayor Michael Bloomberg’s gun control group.